Coffee maker



FIG. 1 is a rear right side perspective view of a coffee maker showing my new design;

FIG. 2 is a front, right side perspective view thereof;

FIG. 3 is a right side perspective view in an "in use" position thereof;

FIG. 4 is a rear left perspective view of FIG. 1;

FIG. 5 is a right side perspective view of FIG. 3 enlarged and broken away on both sides for ease of illustration; and,

FIG. 6 is a front left side perspective view of FIG. 1.

The portions in broken line are for illustrative environmental purposes only and form no part of the claimed design. 

The ornamental design for a coffee maker, as shown and described. 